Submission

Score: 100

User: Kei

Problemset: ตรวจบัตรเครดิต

Language: cpp

Time: 0.005 second

Submitted On: 2026-10-08 13:17:21

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int,int>;

void solve(){
    vector<int> t;
    string s; cin >> s;
    vector<int> v;
    for(char c : s) v.push_back(c - '0');
    int check=v.back();
    v.pop_back();
    int sum=0;

    reverse(v.begin(),v.end());
    for(int i=0;i<(int)v.size();i+=2){
        v[i]*=2;
    }
    for(int& x : v){
        if(x>=10){
            t.push_back(x/10);
            t.push_back(x%10);
            continue;
        }
        t.push_back(x);
    }
    for(int&x : t){
        sum+=x;
    }
    if(check==(10-(sum%10))%10){
        cout << "yes";
        return;
    }
    cout << "no";
}
int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    solve();
    return 0;
}